I just "successfully" installed Devstack on my Ubuntu Server 16.04 LTS. I can connect to the Horizon Dashboard without problems but when i try to launch an instance i get errors.
If it try run a cirros image( QCOW2 format) or a Xenial(VMDK) without creating a volume i get the error:
Image %(image_id)s is unacceptable: not able to analyze 'qemu-img info'.
If i also make it create a volume, I get this one:
Volume %(volume_id)s did not finish being created even after we waited 0 seconds or 1 attempts. And its status is "error".
It doesn't look like it is a image's problem.